Calk-sharpening machine.



F. POHLE, J11

CALK SHARPENING MACHINE.

APPLICATION FILED FEB. 17. 19l5.

1,153,25. PatentedSept. 14, 1915.

FREDERICK POHLE, anger HoNEsDaLE, PENNSYLVANIA.

cALK-sHAit'PE'NINe MaomNE.

Specification of ietters Patent.

Patented Sept. 14, 1915.

Application filed February 17, 1915. Serial No. 8,781.

sharpening the calks of horse shoes and wherein a grinding wheel is mounted on the end of a flexible shaft whereby it can be presented to the work in many different positions, and has for its particular object to provide such a device which is light in weight, so that it can be readily carried from place to place, and simple in construction.

A further object is to provide a supplemental grinding wheel mounted adjacent to the driving mechanism and which can be geared to run at different speeds and also constructed and mounted to control the operation of the main grinding disk mounted upon a flexible shaft.

These and other objects hereinafter'set forth are attained by the means illustrated in the accompanying drawing, in which Figure 1 is an elevation of the improved device. Fig. 2 is an elevation ofthe casing with the cover plate removed, showing the train of gears mounted therein. Fig. 3 is a horizontal section on the line 33 of Fig. 2. Fig. 4. is an elevation looking at the rear sideof the casing. Fig. 5 is a vertical cross section on the line 5-5 of Fig. 4, and Fig. 6 is a plan view of the stand showing the supporting standard in section.

In all of the figures of the drawings, similar reference numerals designate like parts.

Referring to the drawing, 10 designates the legs of the stand which are held firmly in position by a plate 11 that is secured thereto preferably by screw-bolts 12 so that the stand can be disassembled when desired. Plate 11 is provided with a central threaded aperture 13 in which is mounted the lower end ofthe standard l l'and this standard is preferably formed with sections of pipe coupled together by the coupling 15, so that the standard also can be disassembled for transportation purposes.

The upper end of the standard is screwed into the bottom of a casing 16 and said casing is designed to support the driving mechanism of the device. The casing includes a removable cover plate 17 which together with the rear wall form the supports for the.severa1 shafts 18, 19 and 20. Upon shaft '18 is loosely mounted a gear wheel 21 which is provided with a sleeve 22 that projects through the cover plate and has a handle- 23 secured on its outer end. This gear wheel 21 meshes with a pinion 24 secured upon shaft 19 and on the same shaft is also fixed a gear wheel 25 which meshes with a pinion 26 fixed on the shaft 18. Thus by turning the handle 23, the shaft 18 is revolved at a high rate of speed through the speed increasing train of gears. On shaft 18 is' also mounted a balance or fly-wheel 27 for the usual purpose.

Shaft 18 is projected through the rear wall of the casing and the end thereof is slotted as shown at 28 to detachably receive the tongued end of a stub shaft 29 which is mounted to rotate in a block 30, said block being mounted to slide in a support 31 fixed to the side of the casing and which has suitable ways to receive the dovetailed lug on the bottomof the block. The outer end of the stub shaft is adapted to detachably receive the usual socket 332 fixed on the end of a flexible shaft 33, and the outer end of said flexible shaft carries a grinding disk 34. Thus it will be seen that when the main shaft 18 is coupled to the stub shaft 29, a high speed is transmitted to the grinding tool on the end of the flexible shaft.

For grinding and sharpening tools and like devices, a supplemental grinding disk 35 is provided, the same being mounted upon the shaft 20, and said shaft is mounted in tubular bearings 36 which are adapted to slide in slots 37 formed in the walls of the casing. On this same shaft 20 is fixed a relatively wide pinion 38 which is adapted to mesh with either the main gear wheel 21 or the second gear wheel 25, accordingly in which end of the slots 37 the shaft is resting. Thus it will be seen that the grinding disk 35 can be given a relatively slow speed from gear wheel 21, or a much higher speed from gear wheel 25. On the front side of the casing the tubular bearing of the disk 35 is projected and provided with a. threaded nut 39, whereby the shaft can be secured in any adjusted position in the slots 37.

It being desirous to cut out one of the grinding disks while the other one is operating, a cut-out mechanism is provided whereby the-shifting of the supplemental grinding disk into and out of operation connects and d'sconnects the other grinding disk. This id accomplished by providing the slidable block 30, with a projecting pin 40, whiclr travels in a cam slot 41, formed in sliding plate 42 pivoted at 43 to an arm 44 which has its lower end pivoted at 45 to the casing, and its upper end mounted on theend of'the shaft 20. Thus by shifting the shaft to either end of the slots 37, the arm 44 will slide the cam plate 42 and consequently move the stub shaft block 30 outwardly and disconnect the end of the stub shaft from the main shaft. It will also be seen, that when the supplemental grinding disk is out of mesh with the drive gears, the shaft will be in operative relation to the main shaft. A set screw 46 is provided for securing the stub shaft block 30 in its ad justed positions. Grinding disk 34 is re movable in the usual manner and, when desired, a miter grinding tool can be substituted therefor, whereby the knives of mowing machines may be sharpened without re-- moving them from their operative position in the mower. I

Having thus fully described the invention, what is claimed is 1. A device of the character described,

' comprising a plurality of grinding mechanisms, a slngle means for rotating said mechanisms, and a single means for alternately connecting sald grinding mechanisms to said rotating means.

2. A device of the character described,

comprising a plurality of grinding mechanisms, a single means for rotating said mechanisms, and a single means operated by the movement of one of said mechanisms for alternately connecting said grinding mechanisms to said rotating means.

3. A device of the character described,

the movement of one of said shafts for connecting or disconnecting said stub shaft to and from said main shaft.

5. A device of the character described,

comprising a rotating means including a main shaft, a second shaft having a grinding disk thereon a sliding stub shaft adapted for rotating a tool, and means operated by the movement of one of said shafts for connecting or disconnecting said stub shaft to and from said main shaft, said means embodying a cam-plate for sliding said stub shaft and an arm connected to said camplate and one of said shafts.

6. A device of the character described, comprising a casing, a. speed increasing 1 gearing in said casing, a'main shaft for said gearing, a slidably mounted stub-shaft supported by said casing and adapted for connection with said main shaft, a second shaft mounted in the casing having a grinding disk thereon and provided with a pinion adapted to engage said train of gearing, and another shaft connected to one end of said stub shaft and having a tool mounted thereon, and a shifting mechanism connecting said stub shaft to said second shaft.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK POHLE, J R.

Witnesses:

CURT A; PoHLE, A. PETERSEN.' 

